Reverberatory furnace



(No Model.) 3 Sheets-Sheet 1.

W. STUBBLEBINE. REVERBERATORY FURNACE No. 456,663. Pad-tented July 28; 1891.

womtoz M I m a qwi/cmeooeo (No Model.) 3 Sheets-Sheet 2.

W. STUBBLEBINE. REVERBERATORY FURNACE.

No. 456,668. Patented July 28, 1891.

qwibmwoeo (No Model.) 3 SheetsSheet 3.

' W. STUBBLEBINE.

RBVERBERATORY FUBNAUE.

No. 456,663. Patented July 28, 1891.

qw dcweooea gvwenlioz UNITED STATES PATENT OFFICE.

IVILLIAM STUBBIIEBINE, OF BETHLEHEM, PENNSYLVANIA.

REVERBERATORY FURNACE.

SPECIFICATION forming part of Letters Patent No. 456,663, dated July 28, 1891;

Application filed February 14, 1891. Serial No. 381,493. (No model.) Patented in Canada February 25, 1891, No. 56.115.

To all whom it may concern:

Be it known that I, \VILLIAM STUBBLE- BINE, a citizen of the United States, and a resident of Bethlehem, in the county of Northampton and State of Pennsylvania, have invented certain new and useful Improvements in Reverberatory Furnaces, (for which I have filed an application, No. 56,115, for a Canadian patent;) and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apsides of the neck and uptake of the furnace which chambers communicate withthe rear end of the puddling-chambers by passages or conduits provided in' the masonry on the sides of the furnace-neck to convey a por tion of the unconsumed gases from the puddling-chamber into the air heating chambers, which gases are utilized to heat the air or steam contained in the coils of pipe or a drum located in said air-heating chambers. In conjunction With the air-heating chambers and the air-heating blast-pipes or a drum I employ mixing flues, arranged longitudinally of the furnace on opposite sides of the puddlingchamber and extended from the air-heating chambers to the fire-chamber, and into these mixing lines, which communicate directly with the air-heating chambers, extend the jet pipes or nozzles of the air-blast pipes or the steam-pipes, whereby heated air or steam is injected. into the mixing-fines, and the gases from the air-heating chambers are drawn into said mixing-flues The air or steam and gases are intimately mixed in said mixing fines, which convey the mixed air and gases to the fire-chamber and discharge them at points over or in juxtaposition to the bridgewall of the fire-chamber, where they meet the flame and gases from the fire-chambe1',thereby insuring perfect combustion and creating intense heat with a less quantity of fuel than is possible with furnaces of ordinary construction.

My invention further consists in the novel construction and arrangement of parts, as will be hereinafter more fully described and claimed.

I have illustrated my improved furnace in the accompanying drawings, in which Figu re I is a vertical longitudinal sectional view through a furnace constructed in accordance with my invention, the plane of the section being taken on the irregular line an m of Fig. II and cutting through the puddling and fire chambers on one side of the central line thereof and through one of the air-heating chambers and the portconnection of said chamber with the puddlingchamber. Fig. II is a horizontal sectional View through the furnace on the plane indicated by the dotted line i] y of Fig. I, the section cutting through the longitudinal mixing: fines, the air-heating chambers, the uptake, and the puddling-chamber, the neck of the furnace being indicated by dotted lines, and also the transverse pipe which connects with the blast-pipe and the two coils of pipes K L. Fig. III is a vertical transverse sectional view, partly in elevation, on the plane indicated by irregular line on m of Fig. II, the section cutting through the rear of the air-heating chambers and the exterior walls of the furnace, the rear of the chimney or uptake being shown in elevation. Fig. IV is a vertical transverse section taken centrally through the uptake and chimney and the two air-heating chambers, the section being taken on the plane indicated by the dotted line 0 0 of Figs. I and II. Fig. V is a vertical longitudinal sectional view on the plane indicated by the dotted line at n of Fig. II, the section cutting centrally through the uptake or chimney and the neck of the furnace, one of the coils of heating-pipes being indicated by dotted lines. Fi VI is a vertical transverse section through the puddlirig-chamberon the plane indicated by the dotted line .2 z of Fig. I.

Like letters of reference denote corresponding parts in the several figures of the drawlugs.

The furnace proper is similar in construction to any of the ordinary puddlirig-furnaces, and it has the fire-chamber A, containing the grate a, the puddling-chamber B, the uptake C, situated at the rear of the puddlingchamber, and the neck or fine D, leading from the puddling-chamber to the uptake. As is usual at bridge-wall E is provided between the fire-chamber and the puddlingchambelya blast-pipe F discharges below the grate in the fire-chamber, and the puddlingchamber has a working-bed b. A f nel-charging door a is provided in the side of the tirechamber, and working-doors b are likewise provided in the sides of the puddling-chamher. All of the parts are constructed as in the common puddling-furnaces familiar to those skilled in the art to which myinvention relates.

The uptake 0 is arranged in the longitudinal center of the furnace and partially surrounded by the air-heating chambers G H, which lie on opposite sides of the uptake, said chambers being connected by a transverse flue or chamber 1, located in the rear of the uptake. (See Fig. III.) The air-heating chambers are connected directly with the puddling-chamber B by passages or fines G H, formed in the masonry on opposite sides of the neck or fine D, leading from the pudtiling-chamber to the uptake, whereby a portion of the unconsumed gases and heat are caused to pass from the pnddling-chamber through the passages to the air-heating chambers.

J J are the mixing-fines provided in the masonry of the furnace and arranged on opposite sides of the puddling-chamber and above the horizontal plane of the workingbed therein, these mixing-fines extending longitudinally of the furnace from the airheating chambers G H to the fire-chamber or bridge-wall at the front of the furnace. The rear ends of the mixing-fines open into or communicate directly with the air-heating chambers, while the front ends of the fines terminate in ports 3' j immediately over the bridge-wall, whereby the commingling air and gas contained in the fines are discharged directly into the flame and gases from the firechamber.

Coils of pipe K L are arranged in the airheating chambers, and these pipes are connected by branch pipes 76 Z to a valved blastpipe M, which is common to both coils of pipe and supplies the air-blast to both mixingfines. The coils of pipe are provided with the jet nozzles or pipes K L, which are of less diameter than the coils, and said reducing jet-nozzles are extended into the rear ends of the mixing-fines, discharging the air into said fines. The gas passages or fines G H open into the air-heating chambers at points in rear of the jet-nozzles, and said nozzles are arranged to leave spaces between themselves and the flue-walls, through which the gases and heat in the producing-chambers are free to pass when drawn by the suction created by the air-blast into the mixing-fines to be commingled therein with the air and discharged by the fiues into the flame passing Over the bridge-Wall. An equivalent of the coils of pipes consists of a drum located in each producing or heating chamber, which drums are connected to the blast-pipe, and each drum is provided with a jet pipe or nozzle extending into the mixing-fines.

In the air-blast coils of pipe I may arrange concentric coils of steam-pipe, as indicated by dotted lines in Fig. I, said coils of steampipes having their discharge ends terminating within or beyond the jet-pipes, so as to inject the steam therein into the mixing-fines.

The furnace is charged and worked in the usual manner; but instead of all the heat and gases from the puddling-chamber escaping into the uptake a portion of such gases and heat passes through the gas fines or passages G H into the chambers G H. The air and steam (either or both) contained in the coil of pipe (or the drums) are heated by passing through said pipes by the gases and heat from the puddling-chamber, and the suction created in the mixing-fines by discharging the air-blast or steam into said fines is sufficient to draw the gases from the heatingchambers into the mixingfines. The air, steam, and gases are intimately commingled and mixed in the fines, and they are highly heated while passing through the fiues by reason of the fines being in close proximity to the puddlingchamber. The commingling air and gases in their heated condition are discharged from the fines immediately over the bridge-wall and they meet the flame and lieat passing from the fire-chamber into the puddling-chamber,therebyinsuringincreased combustion and the maintenance of a high degree of heat in the furnace. The blast in the pipes K L can be adjusted by regulating the valve on in the blast-pipe M. I am thus enabled to utilize a portion of the gases and heat taken from the rear end of the puddlingchamber to heat an air-blast or steam-blast and to commingle said blast and gases, highly heat the same, and utilize them as fuel in maintaining the heat of the furnace.

It has been found by experience with a furnace embodying my present invention that in addition to promoting combustion and maintaining a high degree of heat, a superior quality of iron is produced from the pig-iron, and that economy is effected in the brick and wear of the furnace.

I am aware that changes in the form and proportion of parts and details of construction can be made without departing from the spirit or sacrificing the advantages of my invention, and I therefore reserve the right to make such modifications as fairly fall within the scope of my invention.

Having thus described my invention, what IIO I claim as new, and desire to secure by Letters Patent, is-

1. In a furnace, the combination, with a puddling-chamber, a fire'chamber communicating therewith, and a bridge-wall, of the airheating chambers communicating directly with the rearof said puddling-chamber, the up take situated between the air-heating chambers and communicating with the rear end of said pnddling-chamber, the mixing-fines in communication with said air-heating chamhers and having ports which discharge on opposite sides of the bridge-Wall and above the sam e, and the blast-pipes discharging into said mixing-fines, substantially as and for the purpose described.

2. In a furnace, the combination, with a paddling-chamber, an uptake at one end of said puddling-chamber, and a fire-chamber at a the opposite end of said pnddling-chamber,

of the air-heating chambers located on the opposite side of the uptake and communicating directly with the rearend of the puddling chamber, the mixing-fines communicating with the said air-heating chambers and discharging through ports j into the firechamher, and the blast-pipes having their discharge ends terminating in the mixing-fines, substantially as described.

3. In a furnace, the combination, with a puddling-chamber, a fire-chamber at one end of said puddling-chamber, and an uptake receiving from the opposite end of the puddling-chamber, of the longitudinal mixingpuddling-chamber and a fire-chamber and an uptake connected to the rear end of said puddling-chamber and communicating with the forward end of the puddling-chamber, of the air-h eating chambers connected directly with the rear end of the puddling-chamber by gaspassages, the longitudinal mixing-fines arranged on opposite sides of the puddlingchamber and connected at their rear ends to the air-heating chambers, the front ends of said mixing-fines provided with dischargeports above the bridge-Wall, and the coils or pipes locatedin the air-heating chambers and having discharge-j ets terminating in the mixing-flues in advance of the gas-passages, substantially as described.

In testimony whereof I aitix my signature in presence of two witnesses.

VILLIAM STUBBLEBINE. \Vitnesses:

JACOB DAUTRIET, ELIZABETH A. KRAUSE. 

